Calculating-stand.



No. 861,541. PATENTED JULY 30, 1907, P. RIBGK. K

CALCULATING STAND. APPLIOATION Hum 001212. 1900.

Witnesses= v lnven for.-

THE NORRIS PETERS 1:11., WASHINGTON, u. c.

PATENT OFFICE.

FRANZ RIEOK, OF BOHMENKIROH, GERMANY.

CALCULATING-STAND.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed October 12, 1906. Serial No. 338,637

To all whom it may concern:

Be it known that I, FRANZ RIECK, a subject of the German Emperor,residing at Bohmenkirch, Wiirtemberg, Germany, have invented a new anduseful Calculating-Stand, of which the following is a full, clear, andexact description, such as will enable others skilled in the art towhich it appertains to make and use the same.

The object of my invention is to provide a calculating stand forteaching and practicing arithmetics in schools in an effective and easymanner, the chief features being the arrangement to enable the counters,or any of them, to be obturated from view, a further fea ture being thegeneral disposition of said counters in combination with a blackboard.By reason of this particular disposition it is easy to afford oculardemonstration of any arithmetical problem within the range of 1 to 1110.

Reference is had to the accompanying drawings,- forming part of thisspecification, in which:

Figure 1 is a front elevation of the complete stand; and Fig. 2 is atransverse section on the line A B.

My improved stand consists of an upright frame (1 having feet I) andcarrying a blackboard 0 whose surface is cut away as shown so as toprovide three separate spaces for the counters, ViZ a central space andtwo end spaces. The end space to the right of the drawing contains tenshort horizontal bars of wire 61, each bar or wire having a bead orcounter 0 representing units. Within the central space at the right handside there are ten more such horizontal wires f each carrying a singlebead or counter 9 representing tens. The remainder of said central spaceis fitted with nine equidistant vertical wires h each carrying ten beadsgwhich also represent tens. The hundreds are represented by ten oblongcounters 2', each counter being mounted on a separate horizontal bar orwire j in the left hand space of the blackboard.

The beads g representing the tens are mounted on their vertical wireswith sufficient friction to keep at any elevation for displacement byhand, and they are, further, provided with a guard Z having angular endsmounted on the vertical wires it so as to allow said guards to be turnedeither to the front or the rear of the beads. The beads c and counters ias well as the first row of horizontally mounted beads 9 can be pushedbehind the respective portions of the blackboard.

What I claim and desire to protect by Letters Patent of the UnitedStates of America, is:

1. In a calculating stand, the arrangement of a black board formed withthree separate open spaces, a frame to which the blackboard is secured,wires mounted on said frame adjacent to the spaces of said blackboard,and beads or counters mounted on said wires, as set-f0rth.

2. In a calculating stand, the combination with a blackboard havingthree open spaces, a frame carrying said board, wires fixed in saidframe and beads or counters mounted on said wires, of guards forobturating any or all the rows of beads or counters, as set forth.

FRANZ RIECK.

Witnesses Anannmrr BAUER, ERNST ENTENMANN.

